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Old 06-09-2007, 09:51 PM
Registered User
Join Date: Jan 2007
Posts: 32
SRS Warning Light: 1994 S Class sedan

I just purchased a used 1994 S Class sedan in great condition with 118K miles. I noticed that the SRS warning light comes on with start up and then stays lite for about 2 minutes and then goes off. The owners manual says it should come on and then turn off within 4 seconds. The seller tells me that the SRS light has been staying on for about 1 minute or so for the past year. I also noticed that the seatbelt red light is lite up for maybe 30 seconds despite being buckled in. What does the SRS light staying on as described signify? airbags? seatbelt electrical connection?

Do the airbags need to be recertified or recharged on a certain schedule? If so, how expensive would this be?

Thanks for everyone's advice on this.

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Old 06-10-2007, 05:53 PM
Senior Member
Join Date: Jul 2002
Location: visalia ca
Posts: 368
not sure why its doing that. maybe just old.
as long as it goes off and stays off you should be ok.
no, the airbags do not have to be replaced or serviced.
mb just came out and extended the life of them again
so don't worry about that.

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Old 06-11-2007, 08:21 AM
pcmaher's Avatar
Big Black V12
Join Date: Apr 2003
Location: Chicago, IL
Posts: 430
Get fault codes pulled. Could be a number of things. One thing that comes to mind is a faulty passenger seat occupancy sensor.
1995 S600, 1 of 618 (sold)

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Old 06-11-2007, 12:20 PM
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Join Date: Sep 2002
Posts: 3,046
The seat belt buckles have internal switches which report to the SRS control module. In my experience, they're the most common parts to fail.
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Old 06-11-2007, 12:47 PM
A. Rosich's Avatar
Registered User
Join Date: Nov 1999
Posts: 883
The SRS light staying on for so long is definitely something to look at, not normal.

About the seatbelt "buckle-up" warning light, don't worry, it is normal for the light to come up ALWAYS even if all seat belts are properly fastened.

A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]
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